Spread spectrum radar device using pseudorandom noise signal for

Details Spread spectrum radar device using pseudorandom noise signal for Spread spectrum radar device using pseudorandom noise signal for

1995-11-22

1998-03-03

Sotomayor, John B.

Communications: directive radio wave systems and devices (e.g.,

Return signal controls external device

Radar mounted on and controls land vehicle

342 71, 342 72, G01S 1393

Patent

active

057240418

ABSTRACT:
A radar device transmits by a transmitting part a wave whose band is spread by a PN code from a PN generator, receives at a receiving part a reflected wave from an object based on the wave and detects the object by detecting correlation between the received signal and the PN code. In this radar device, the received signal which is spread to a wide range is converted to a low-frequency band which is easy to be measured by a down converter so that a signal is generated when correlation is made by a delay of the PN code from a delay circuit, and generates a pulse signal through waveform shaping of the signal to detect the object and to measure its relative speed and distance at a processing part according to the pulse signal and the delay time.

REFERENCES:
patent: 3735398 (1973-05-01), Ross
patent: 3750169 (1973-07-01), Strenglein
patent: 4443799 (1984-04-01), Rubin
patent: 5274380 (1993-12-01), Yatsuka et al.

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